Removes up to 99% of chlorine from the water as well as various natural organic compounds, taste and odor compounds and synthetic organic chemicals. Our carbon blocks are made of high grade coconut shell carbon for fast chlorine adsorption. Our filters are made for 20" x 4.5" big blue housings and are compatible with iSpring, Pentair/Pentek, Tier1, Aquaboon, Omnifilter, Geekpure, MatriKX, and Simpure and may others. These filters are compatible to FC25B, 32-450-20-GREEN, CBC-20BB, FXB20CL2, and many more. Our high grade coconut carbon shell carbon block filters are made for maximum filtration efficiency and filter life with minimal impact on the water flow (up to 15 GPM) and require minimal maintenance. With 5 micron filtration, you'll have great tasting clean water throughout the home. Our replacement water filter cartridges are individually wrapped to ensure freshness. These are best used for whole house filtration, general water filtration, chlorine removal, and reverse osmosis systems Our Carbon Block filter cartridges are extruded by high quality activated coconut shell carbon. Coconut shell activated carbon filters have a better filtration effect to chemicals like chlorine, organic compounds, and synthetic chemicals. Product Characteristics Made by active carbon particle loading body. Good absorption: can adsorb organic matter, heavy metal ions, and charged ions in the fluid. Dual functions: filtration and purification. Effectively: can remove the residual chlorine, odor, color and organic matter in the water. High flow; Fast absorption; Long service lifeApplication Pre-filtration treatment of drinking water R.O system prefilter Pre-treatment for water softeners